8.7 Performance requirements for SPUCCH

36.1413GPPBase Station (BS) conformance testingEvolved Universal Terrestrial Radio Access (E-UTRA)Release 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

8.7.1 ACK missed detection for single user SPUCCH format 1a

8.7.1.1 Definition and applicability

The performance requirement of single user SPUCCH for ACK missed detection is determined by the two parameters: probability of false detection of the ACK and the probability of detection of ACK. The performance is measured by the required SNR at probability of detection equal to 0.99. The probability of false detection of the ACK shall be 0.01 or less.

The probability of false detection of the ACK is defined as a conditional probability of erroneous detection of the ACK when input is only noise.

The probability of detection of ACK is defined as conditional probability of detection of the ACK when the signal is present.

The test is applicable to all BS. A test for a specific channel bandwidth is only applicable if the BS supports it.

For a BS supporting multiple channel bandwidths only the tests for the lowest and the highest channel bandwidth supported by the BS are applicable.

ACK/NACK repetitions are disabled for SPUCCH transmission.

8.7.1.2 Minimum Requirement

The minimum requirement is in TS 36.104 [2] subclause 8.7.

8.7.1.3 Test Purpose

The test shall verify the receiver’s ability to detect ACK in SPUCCH under multipath fading propagation conditions for a given SNR.

8.7.1.4 Method of test

8.7.1.4.1 Initial Conditions

Test environment: Normal, see subclause D.2.

RF channels to be tested: M; see subclause 4.7.

1) Connect the BS tester generating the wanted signal, multipath fading simulators and AWGN generators to all BS antenna connectors for diversity reception via a combining network as shown in Annex I.3.2.

8.7.1.4.2 Procedure

1) Adjust the AWGN generator, according to the channel bandwidth, defined in Table 8.7.1.4.2-1.

Table 8.7.1.4.2-1: AWGN power level at the BS input

Channel bandwidth [MHz]	AWGN power level
5	-86.5dBm / 4.5MHz
10	-83.5dBm / 9MHz
15	-81.7dBm / 13.5MHz
20	-80.4dBm / 18MHz

2) The characteristics of the wanted signal shall be configured according to TS 36.211 [12].

3) The multipath fading emulators shall be configured according to the corresponding channel model defined in Annex B

4) Adjust the equipment so that the SNR specified in Table 8.7.1.5-1 is achieved at the BS input during the ACK transmissions.

5) The signal generator sends a test pattern with the pattern outlined in figure 8.7.1.4.2-1. The following statistics are kept: the number of ACKs detected in the idle periods and the number of missed ACKs transmitted on SPUCCH.

Figure 8.7.1.4.2-1: Test signal pattern for single user PUCCH format 1a demodulation tests

8.7.1.5 Test Requirement

The ACK missed detection probability shall not exceed 1% at the SNR given in Table 8.7.1.5-1.

Table 8.7.1.5-1: Minimum requirements for single user SPUCCH format 1a, 1Tx

Number of TX antennas	Number of RX antennas	Cyclic Prefix	Propagation conditions and correlation matrix (Annex B)	Channel Bandwidth / SNR [dB]
Number of TX antennas	Number of RX antennas	Cyclic Prefix	Propagation conditions and correlation matrix (Annex B)	5 MHz	10 MHz	15 MHz	20 MHz
1	2	Normal	EPA 5 Low	4.3	4.2	4.4	4.4
1	4	Normal	EPA 5 Low	0.5	0.4	0.5	0.5

8.7.2 ACK missed detection requirements for SPUCCH format 4

8.7.2.1 Definition and applicability

The performance requirement of PUCCH format 4 for ACK missed detection is determined by the two parameters: probability of false detection of the ACK and the probability of detection of ACK. The performance is measured by the required SNR at probability of detection equal to 0.99. The probability of false detection of the ACK shall be 0.01 or less.

The probability of false detection of the ACK is defined as a conditional probability of erroneous detection of the ACK at particular bit position when input is only noise.

The probability of detection of ACK is defined as conditional probability of detection of the ACK when the ACK was sent at particular bit position. Each missed ACK bit is counted as one error.

The test is applicable to all BS. A test for a specific channel bandwidth is only applicable if the BS supports it.

For a BS supporting multiple channel bandwidths only the tests for the lowest and the highest channel bandwidth supported by the BS are applicable.

The number of encoded ACK/NACK bits per sub-slot is defined as presented below:

– 3AN bits (AAA): applicable for FDD and TDD

The transmitted sub-slots include both subslot with =2 and subslot with =3. ACK/NACK repetitions are disabled for SPUCCH transmission.

8.7.2.2 Minimum Requirement

The minimum requirement is in TS 36.104 [2] subclause 8.7.

8.7.2.3 Test Purpose

The test shall verify the receiver’s ability to detect ACK bits under multipath fading propagation conditions for a given SNR.

8.7.2.4 Method of test

8.7.2.4.1 Initial Conditions

Test environment: Normal, see subclause D.2.

RF channels to be tested: M; see subclause 4.7.

8.7.2.4.2 Procedure

1) Adjust the AWGN generator, according to the channel bandwidth, defined in Table 8.7.2.4.2-1.

Table 8.7.2.4.2-1: AWGN power level at the BS input

Channel bandwidth [MHz]	AWGN power level
5	-86.5dBm / 4.5MHz
10	-83.5dBm / 9MHz
15	-81.7dBm / 13.5MHz
20	-80.4dBm / 18MHz

2) The characteristics of the wanted signal shall be configured according to TS 36.211 [12].

3) The multipath fading emulators shall be configured according to the corresponding channel model defined in Annex B

4) Adjust the equipment so that the SNR specified in Table 8.7.2.5-1 is achieved at the BS input during the ACK transmissions.

5) The signal generator sends AAA codeword in regular time periods. The following statistics are kept: the number of ACK bits falsely detected in the idle periods and the number of missed ACK bits. Each falsely detected ACK bit in the idle periods is accounted as one error for the statistics of false ACK detection, and each missed ACK bit is accounted as one error for the statistics of missed ACK detection.

8.7.2.5 Test Requirement

The ACK missed detection probability shall not exceed 1% at the SNR given in Table 8.7.2.5-1 for 3 AN bits per subslot.

Table 8.7.2.5-1: Minimum requirements for SPUCCH format 4, 3AN bits

Number of Tx antennas	Number of RX antennas	Cyclic Prefix	Propagation Conditions and correlation matrix (Annex B)	Channel Bandwidth / SNR [dB]
Number of Tx antennas	Number of RX antennas	Cyclic Prefix	Propagation Conditions and correlation matrix (Annex B)	5MHz	10 MHz	15MHz	20MHz
1	2	Normal	EPA 5 Low	6.8	6.9	6.8	6.8
1	4	Normal	EPA 5 Low	1.1	1.1	1.3	1.4

NOTE: If the above Test Requirement differs from the Minimum Requirement then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in Annex G.